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G. E. HART.

WINDING PINION AND RATGHET FOR WATCHES. No. 345,588.

Patented July 13, 1886.

Aw. j, GM QWWQ dmw/ @QAJJZ/ha /////ZJIOMLJ/ W ns, Photmljlhognph UNITED STATES PATENT OEEreE.

GEORGE E. IIART, OE XVATERBURY, CONNECTICUT, ASSIGNOR TO THE IVATERBURY XVATCH COMPANY, OF SAME PLACE.

WINDING PlNiON AND RATCHET FOR WATCHES.

QPECIFICATION forming part of Letters Patent No. 345,588, dated July 18, 1886.

Application filed July 7, 1885. Serial No. 170,883.

To all whom it may concern.-

Be it known that l, GEORGE E. HART, of Waterbury, in the county of New Haven, and in the State of Connecticut, have invented certain new and useful Improvements in Combined \Vinding Pinion and Ratchet; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which Figure l is a perspective view of my blank from the ratchet side after having been operated upon by the swaging-dies. Fig. 2 is a like view of the same from the opposite side COmPlOtGfhTllld Fig.8 is a central section of the same upon an axial line.

Letters of like name and kind refer to like parts in each of the figures.

The object of my invention is to simplify and lessen the expense of construction, and to increase the efficiency and durability of 00111- bined winding pinions and ratchets; to which end said invention consists ,as a new article of manufacture, in a spur winding-pinion having a hub and central orifice, and an annular depression or recess in its face adjacent to said orifice, the surface of such recess being formed into ratchet-teeth facing outward, all made in one piece, substantially as and for the purpose described.

In carrying my invention into practice I employ a disk of metal, preferably steel, which has the required diameter and thickness, and subject the same to pressure between two dies, one of which is the reverse of the rear face and the other of the front face of the finished pinion, such pressure being suflicientto cause (No model) said faces to assume the desired form. The result is a piuion-blank, A, that has upon its rear face a hub, a, and within its front face a concentric ratchet, a, the teeth of which latter are just flush with or below the remaining portion of said face. The wheel is next provided with an axial opening, a and with peripheral teeth a", which complete it. If desired, said axial opening may be formed before the dies are used, in which event it would form a contering-guide for the same.

The pinion described possesses much more strength and durability than could otherwise be secured, as its material is compressed and made far more dense than in its normal condition. The ratchet is as perfect as though produced separately by a cutting-engine, and far more perfect than would be obtainable if, as

GEORGE E. HART.

\Vitnesses:

GEO. S. PRINDLE, HENRY O. HAZARD. 

